Skip to main content
SpringerLink
Log in

Determination of 237 Np in marine sediment and seawater

  • Published:
Journal of Radioanalytical and Nuclear Chemistry Aims and scope Submit manuscript

Abstract

Procedures for determination of neptunium in marine sediment and seawatersamples are described. Iron hydroxide Fe(OH)2 –Fe(OH)3 is used for preliminary pre-concentration of neptunium. Secondly,neptunium Np4+ and Pu3+ are separated by tri-isooctylamine-(TIOA)extraction in 8–10M HCl by redox with SO3 2–-Fe3+ Neptunium Np4+ and uranium U6+ areseparated by back extraction the Np4+ with 2M HCl. Finally, theneptunium is purified from the uranium and thorium by anion exchange in 8MHNO3 and 12M HCl. The stripping of 6M HCl + NH2 OH HClfurther separates the neptunium Np3+ and uranium. Reduction bySO 32– –Fe3+ appeared to be an efficientway to obtain Np4+ The decontamination factors of the procedureare 4.0. 104 for 232 Th, 5.6 . 104 for uraniumand 1.6 . 104 for plutonium.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Log in via an institution

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Similar content being viewed by others

References

  1. B. R. Harvey, L. M. Thurston, Analytical Procedure for the Determination of Neptunium Radionuclides in Marine Water Sediments and Biota, ISSN 0953-4466, Lowestoft, 1988.

  2. F. E. Butler, Rapid bioassay methods for plutonium, neptunium and uranium, Health Phys., 15 (1968) 19.

    PubMed  Google Scholar 

  3. B. R. Harveyet al., J. Radioanal. Nucl. Chem., 115 (1987) 357.

    Google Scholar 

  4. B. R. Harveyet al., Nucl. Instr. Meth. Phys. Res., 223 (1984) 224.

    Google Scholar 

  5. B. R. HARVEY et al., Nucl. Instr. Meth. Phys. Res., A254 (1987) 172.

    Google Scholar 

  6. R. J. Pentreathet al., Mar. Ecol. Progr. Ser., 6 (1981) 243.

    Google Scholar 

  7. D. S. Popplewellet al., J. Radioanal. Nucl. Chem., 115 (1987) 191.

    Google Scholar 

  8. R. S. Newbury, A. W. Searcy, Inorg. Chem., 1 (1962).

  9. T. M. Beasly, K. A. Orlandini, A. Aarkrog, A. P. Trapeznikov, V. N. Pozolotina, J. Environ. Radioact., 39 (1998) 215.

    Google Scholar 

Download references

Author information

Authors and Affiliations

  1. Nuclear Safety Research and Facilities Department, Riso National Laboratory, DK-4000, Roskilde, Denmark

    A. Jensen

Authors
  1. A. Jensen
    View author publications

    You can also search for this author in PubMed Google Scholar

Rights and permissions

Reprints and permissions

About this article

Cite this article

Jensen, A. Determination of 237 Np in marine sediment and seawater. Journal of Radioanalytical and Nuclear Chemistry 249, 527–533 (2001). https://doi.org/10.1023/A:1013277711096

Download citation

  • Issue Date:

  • DOI: https://doi.org/10.1023/A:1013277711096

Keywords

Search

Navigation